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biml is a Boolean calculator Implemented in Many Languages. The goal is to have a simple calculator that takes a booleanexpression and returns a truth table in a large number of languages, written by many people.
JBooleanExpression is a simple Java API to evaluate a Boolean String Expression like "!true&&false||true" (parse a Boolean String Expression to a boolean primitive type)
nobel is small ANSI C written, OS independent booleanexpression parsing library and program, aimed for projects that need booleanexpression parsing support built-in and bigger tools present overkill in size or options.
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BEEJ is a BooleanExpression Editor for Java. This library provides a GUI interface to build complex (or simple) expressions with your options as a base component.